796 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME I 



and the fourth at 11 + 12. There is at least one cirrus with 19 segments; the penulti- 

 mate is slightly longer than broad and the terminal claw is a little curved. Another 

 specimen has the width at the first syzygy 1.8 mm., the length to 9 + 10 is 9 mm., and the 

 centrodorsal is 2.5 mm. high. A third has the arm width 1.4 mm. and the first 9 brachials 

 together measure 8.0 mm. The fourth has the centrodorsal broken, the arm width is 

 2.1 mm, and the length to 9 + 10 is 9.5 mm. The second syzygy is in this position on all 

 four remaining arms. P b , P c , and P 3 are all more or less complete with over 20 segments. 



Localities. -Albatross station 5173; in the vicinity of Jolo (Sulu) ; Jolo light bearing 

 N. 82 E., 6.75 miles distant Oat. 602'55" N., long. 12053'00" E.); 340 meters; 

 sheUs and coral; March 5, 1908 [A. H. Clark, 1908] (1, U.S.N.M., 35929). 



Siboga station 95; Jolo (Sulu) archipelago (lat. 543'30" N.,long. 1]940'00"E.); 

 522 meters; stony bottom; June 26, 1899 [A. H. Clark, 1918] (5, Amsterdam Mus.). 



Albatross station 4934; Eastern Sea, off Kagoshima Gulf; Sata Misaki light bear- 

 ing N. 7730' E., 7 miles distant (lat. 3058'30" N., long. 13032'00" E.); 188- 

 278 meters; temperature 13.33 C.; bottom rocky; August 16, 1906 [A. H. Clark, 

 1907, 1908, 1921] (13, U.S.N.M., 22699, 35930). Type locality. 



Dr. Mortensen's Japanese station 7; off Kiu-Shiu, Japan (lat. 3217' N., long. 

 12811' E.); 200 meters; sand; May 14, 1914 [Gislen, 1927] (1, C.M.). 



Dr. Mortensen's Japanese station 24; Sagami Sea; 914 meters; June 26, 1914 

 [Gislen, 1927] (1, C.M.). 



Dr. Mortensen's Pacific Expedition; 7 miles S. of Olutanga, Mindanao; c. 548 me- 

 ters; hard bottom; March 8, 1914 (1, C.M.). 



Danish Expedition to the Kei Is. station 49; 245 meters; sand; May 3, 1922 

 (1, C.M.). 



Geographical range. From the Jolo (Sulu) archipelago, Kei Islands and Philippines, 

 northward to southern Japan. 



Bathymetrical range. From 200 (?188) to 914 meters. 



Thermal range. One record, 13.33 C. 



Remarks.- In my first account of the species of Pentametrocrinus collected by the 

 Albatross off southern Japan in 1906, published in 1907, I confused this form with 

 P. japonicus with which it agrees in pinnulation in contrast to the other common 

 Japanese species P. varians. But this error was almost immediately discovered, and 

 P. diomedeae was described in 1908, a Philippine station being added to the original 

 Japanese locality. The Siboga had already met with this form in the Philippines in 

 1899 and the specimens collected were described in 1918. 



PENTAMETROCRINUS JAPONICUS (P. H. Carpenter) 



FIGURE 50 



[See also vol. 1, pt. 1, figs. 67 (not 66 as given in the legend (p. 93), 299(p. 264), 404(p. 311), 513(p. 373; 



pt. 2, figs. 114, 115(p. 67)] 



Eudiocrinus japonicus P. H. CARPENTER, Journ. Linn. Soc. (Zool.), vol. 16, 1882, p. 495 (in key), 

 p. 499 (description; Challenger sta. 235); Challenger Reports, Zoology, vol. 11, pt. 32, 1884, 

 pp. 47, 109, 127, 339, 378 (notes). PERKIER, Memoire sur ] 'organisation et le deveioppement de la 

 comatule de la Me'diterrane'e, 1886, p. 106 (sacculi) . P. H. CARPENTER, Challenger Reports, Zoology, 

 vol. 26, pt. 60, 1888, p. 84 (description; Challenger sta. 235); pi. 7, figs. 1, 2. MINCKERT, Arch. 

 Naturg., Jahrg. 71, vol. 1, Heft 1, 1905, p. 171 (syzygies). HAMANN, Bronn's Klassen und Ord- 

 nungen des Tier-Reichs, vol. 2, Abt. 3, 1907, p. 1576 (listed). A. H. CLARK, Proc. U.S. Nat. 



